"scripts": {
  "watch-sass": "sass sass/main.scss css/style.css --watch",
  "compile-sass": "sass sass/main.scss css/style.comp.css",
  "concat-css": "concat -o css/style.concat.css css/additional.css css/style.comp.css",
  "prefix-css": "postcss --use autoprefixer -b 'last 5 versions' css/style.concat.css -o css/style.prefix.css",
  "compress-css": "sass css/style.prefix.css css/style.css --style=compressed --no-source-map",
  "build-css": "npm-run-all compile-sass concat-css prefix-css compress-css"
},
"devDependencies": {
    "autoprefixer": "^10.4.0",
    "npm-run-all": "^4.1.5",
    "postcss-cli": "^9.1.0",
    "sass": "^1.45.1"
  	"concat": "version"
  }
npm install live-server -g